I'm getting pretty good at saving up for the more expensive (say $100+) purchases, but boy the little amounts add up quickly..
I just added up the unbudgeted expenses I know we have coming up next month. It's mainly $10 here, $20 there (mostly for homeschooling activities), but all up there's $100 that's just not budgeted for.
No wonder I'm having trouble balancing the budget!
I've made a list of the amounts I know about, worked out where I can cut to get the money and stuck the list to the fridge to remind me to not spend anything other than that!